Speaker
Description
Recent theoretical progress has enabled precision calculations of energy flux on charged particles alone, allowing data-theory comparisons for measurements using high-quality tracking detectors. We present a measurement of the energy-energy correlator using charged particles with high angular resolution in $e^{+}e^{-}$ at $\sqrt{s}=91.2~\mathrm{GeV}$, using the newly released DELPHI Open Data. Our results are compared to record-precision theoretical predictions, at NNLL accuracy in the collinear region and NNNNLL accuracy in the back-to-back region, covering the full spectrum of the correlator and probing QCD over three orders of magnitude in scale. It reveals interesting emergent phenomena, including light-ray quasi-particle states, flux-tube excitations, and their transitions into confined hadrons. The measurement establishes a new benchmark for energy-flux measurements in small systems and provides an important reference for energy correlators in heavy-ion collisions. This work constitutes the first physics analysis based on DELPHI Open Data and, by leveraging the preserved DELPHI detector simulation and reconstruction chain, provides an end-to-end experimental landmark for precision studies with archived collider datasets.
| Is this an experimental talk? | Yes |
|---|---|
| Is this on behalf of a collaboration? | No |
| Are you willing to present as a poster if it is not selected for oral presentation? | Yes |